Create 3D world map from .svg file
It's because a huge amount of self-intersections:

and lots of vertex(100 thousand). So you need to simplify this map, or maybe, find a map that less complex?

So, to manage this task, I use Inkscape, as a svg editor.


In Inkscape go through groups by doble-clicking on map while status bar will say, that you selected the curve.
Next - simplify curve Ctrl + L or in menu Curve
Next, beat a self-intersections. Break apart curve by Shift +  Ctrl +K (menu Object) and Boolean union  Ctrl + +  (menu Object) 
Finally, export in blender. After operations in Inkscape, object still buggy:




but in my case, there is only 3 places with intersections, that I need to fix:



Just move one vertex a little bit:



Or delete:



And how to find those dots:



Search for very top point where model starts to go wrong.